diff --git a/tests/test_readme.py b/tests/test_readme.py
index 258a0477..06787ee1 100644
--- a/tests/test_readme.py
+++ b/tests/test_readme.py
@@ -1,8 +1,12 @@
+import os
+os.environ['TYPECHECK'] = 'True'
+
 import torch
 import pytest
 
 from alphafold3_pytorch import (
-    PairformerStack
+    PairformerStack,
+    MSAModule
 )
 
 def test_pairformer():
@@ -24,3 +28,25 @@ def test_pairformer():
 
     assert single.shape == single_out.shape
     assert pairwise.shape == pairwise_out.shape
+
+def test_msa_module():
+
+    single = torch.randn(2, 16, 512)
+    msa = torch.randn(2, 7, 16, 64)
+    pairwise = torch.randn(2, 16, 16, 128)
+    mask = torch.randint(0, 2, (2, 16)).bool()
+
+    msa_module = MSAModule(
+        dim_single = 512,
+        dim_pairwise = 128,
+        dim_msa = 64
+    )
+
+    pairwise_out = msa_module(
+        single_repr = single,
+        msa = msa,
+        pairwise_repr = pairwise,
+        mask = mask
+    )
+
+    assert pairwise.shape == pairwise_out.shape